If you recall, PixelQi's founder, Mary Lou Jepsen, is the brains behind the OLPC's breakthrough reflective screen, and an evangelist for the idea that the future of the computer is in displays. When we talked to her about the problems with e-readers, she predicted that LCD would overtake electrophoretic display technology—aka E-ink—by 2010.
The idea isn't crazy if Pixel Qi's displays match the hype: One screen that delivers a high-res, color LCD for normal computer stuff; an e-paper mode that's even more readable than e-ink; and a super low-power black-and-white mode. And is cheap to make and advance, since it's fabricated in standard LCD factories. It makes the possibility of a single tablet computer that really can do everything that much more possible.